Capacitive, deionization with carbon aerogel electrodes: Carbonate, sulfate, and phosphate

摘要

A process for the capacitive deionization (CDI) of water with a stack of carbon aerogel electrodes has been developed by Lawrence Livermore National Laboratory. Unlike ion exchange, electricity is used instead of chemicals for regeneration of the system. Water with various anions and cations is pumped through the electrochemical cell. After polarization, ions are electrostatically removed from the water and held in the electric double layers formed at the surfaces of electrodes. The water leaving the cell is purified as desired.